Bill de Blasio, mayor of New York, demonstrates a non-contact thermal thermometer with Richard Carranza, chancellor of the New York City Department of Education, during a news conference at New Bridges Elementary School, ahead of schools reopening, in the Brooklyn borough of New York City, amid the coronavirus disease (COVID-19) outbreak in New York, U.S., August 19, 2020. Jeenah Moon/Pool via REUTERS TPX IMAGES OF THE DAY

A woman wears a mask inside a glass-covered bus stop in which a thermal imaging camera, UV sterilizer, air conditioner, CCTV and digital signage are set, to avoid the spread of COVID-19 in Seoul, South Korea, August 14, 2020. REUTERS/Heo Ran

A woman waits for the bus inside a glass-covered stop in which a thermal imaging camera, UV sterilizer, air conditioner, CCTV and digital signage are set, to avoid the spread of COVID-19 in Seoul, South Korea, August 14, 2020. REUTERS/Heo Ran

People wait for the bus inside a glass covered stop in which a thermal imaging camera, UV sterilizer, air conditioner, CCTV and digital signage are set, to avoid the spread of COVID-19 in Seoul, South Korea, August 14, 2020. REUTERS/Heo Ran

A security employee wearing a thermal imaging VF helmet monitors passengers as they wait for to board an Anadolujet flight to Stuttgart, Germany at Sabiha Gokcen Airport during the first day of resumed international flights that were halted amid the spread of the coronavirus disease (COVID-19), in Istanbul, Turkey June 11, 2020. REUTERS/Murad Sezer

A security employee wearing a thermal imaging VF helmet monitors passengers as they wait for to board an Anadolujet flight to Stuttgart, Germany at Sabiha Gokcen Airport during the first day of resumed international flights that were halted amid the spread of the coronavirus disease (COVID-19), in Istanbul, Turkey June 11, 2020. REUTERS/Murad Sezer

A security employee wearing a thermal imaging VF helmet monitors passengers as they wait for to board an Anadolujet flight to Stuttgart, Germany at Sabiha Gokcen Airport during the first day of resumed international flights that were halted amid the spread of the coronavirus disease (COVID-19), in Istanbul, Turkey June 11, 2020. REUTERS/Murad Sezer

A security employee wearing a thermal imaging VF helmet monitors passengers as they wait for to board an Anadolujet flight to Stuttgart, Germany at Sabiha Gokcen Airport during the first day of resumed international flights that were halted amid the spread of the coronavirus disease (COVID-19), in Istanbul, Turkey June 11, 2020. REUTERS/Murad Sezer

A security employee wearing a thermal imaging VF helmet monitors passengers before they line up for the passport control at Sabiha Gokcen Airport during the first day of resumed international flights that were halted amid the spread of the coronavirus disease (COVID-19), in Istanbul, Turkey June 11, 2020. REUTERS/Murad Sezer

An employee wearing a thermal imaging VF helmet monitors passengers at the entrance of Istanbul Airport during the first day of resumed domestic flights which are halted since March 26 amid the spread of the coronavirus disease (COVID-19), in Istanbul, Turkey June 1, 2020. REUTERS/Umit Bektas

An employee wearing a thermal imaging VF helmet monitors passengers at the entrance of Istanbul Airport during the first day of resumed domestic flights which are halted since March 26 amid the spread of the coronavirus disease (COVID-19), in Istanbul, Turkey June 1, 2020. REUTERS/Umit Bektas

An employee wearing a thermal imaging VF helmet monitors passengers at the entrance of Istanbul Airport during the first day of resumed domestic flights which are halted since March 26 amid the spread of the coronavirus disease (COVID-19), in Istanbul, Turkey June 1, 2020. REUTERS/Umit Bektas

An employee wearing a thermal imaging VF helmet monitors passengers at the entrance of Istanbul Airport during the first day of resumed domestic flights which are halted since March 26 amid the spread of the coronavirus disease (COVID-19), in Istanbul, Turkey June 1, 2020. REUTERS/Umit Bektas

A screen shows a thermal imaging system to take the corporal temperature of the passengers inside the Paris Charles de Gaulle airport to identify people potentially infected with the coronavirus disease (COVID-19) in Roissy-en-France near Paris, France, May 14, 2020. REUTERS/Charles Platiau

A poster indicates the set up of a thermal imaging system to take the corporal temperature of the passengers inside the Paris Charles de Gaulle airport to identify people potentially infected with the coronavirus disease (COVID-19) in Roissy-en-France near Paris, France, May 14, 2020. REUTERS/Charles Platiau

A screen shows a thermal imaging system to take the corporal temperature of the passengers inside the Paris Charles de Gaulle airport to identify people potentially infected with the coronavirus disease (COVID-19) in Roissy-en-France near Paris, France, May 14, 2020. REUTERS/Charles Platiau

A screen showing a thermal imaging system is seen as Israel's airport authority announced a pilot programme revealing what passengers leaving Israel should except as air travel gradually returns to normal after weeks of bare minimum flights due to the coronavirus disease (COVID-19) outbreak, at Ben Gurion International Airport, in Lod, near Tel Aviv, Israel May 14, 2020. REUTERS/Ronen Zvulun

A member of the voluntary ambulance service organisation DYA (Detente y Ayuda) uses a thermal imaging camera to take the temperature of a train passenger, as half of Spain enters 'Phase 1' with the easing of one of Europe's strictest coronavirus disease (COVID-19) lockdowns, in Bilbao, Spain, May 11, 2020. REUTERS/Vincent West

A member of the voluntary ambulance service organisation DYA (Detente y Ayuda) uses a thermal imaging camera to take the temperature of a train passenger, as half of Spain enters 'Phase 1' with the easing of one of Europe's strictest coronavirus disease (COVID-19) lockdowns, in Bilbao, Spain, May 11, 2020. REUTERS/Vincent West

A member of the voluntary ambulance service organisation DYA (Detente y Ayuda) uses a thermal imaging camera to take the temperature of a train passenger, as half of Spain enters 'Phase 1' with the easing of one of Europe's strictest coronavirus disease (COVID-19) lockdowns, in Bilbao, Spain, May 11, 2020. REUTERS/Vincent West

A member of the voluntary ambulance service organisation DYA (Detente y Ayuda) uses a thermal imaging camera to take the temperature of a train passenger, as half of Spain enters 'Phase 1' with the easing of one of Europe's strictest coronavirus disease (COVID-19) lockdowns, in Bilbao, Spain, May 11, 2020. REUTERS/Vincent West

A police officer wears a "Thermal Corona Combat Headgear" to monitor the temperature of commuters at a police check post, during a nationwide lockdown to slow the spread of the coronavirus disease (COVID-19), in New Delhi, India May 11, 2020. REUTERS/Adnan Abidi TPX IMAGES OF THE DAY

A screen shows a thermal imaging system taking the corporal temperature of a customer carrying bags at the entrance to a reopened commercial center, following the coronavirus disease (COVID-19) outbreak, in Santiago, Chile April 30, 2020. REUTERS/Ivan Alvarado

Evan Steiner, who sells surveillance equipment in California through his firm EnterActive Networks LLC, attend an interview about the use of thermal imaging cameras, including those made by Dahua Technology, in San Francisco, California, U.S. April 24, 2020. Picture taken April 24, 2020. REUTERS/Nathan Frandino

A temperature screening area is set up in an office to demonstrate the use of Dahua Technology's thermal imaging cameras in San Francisco, California, U.S. April 24, 2020. Picture taken April 24, 2020. REUTERS/Nathan Frandino

A Dahua Technology thermal imaging camera is seen during a demonstration of the camera at an office in San Francisco, California, U.S. April 24, 2020. Picture taken April 24, 2020. REUTERS/Nathan Frandino

A temperature screening area is set up for a thermal imaging camera made by Zhejiang Dahua Technology Co., Ltd during a demonstration in San Francisco, California, U.S. April 24, 2020. Picture taken April 24, 2020. REUTERS/Nathan Frandino

A camera of a thermal imaging system is seen inside a public hospital to measure temperature and identify people potentially infected with the coronavirus disease (COVID-19) in Valparaiso, Chile April 23, 2020. REUTERS/Rodrigo Garrido

A camera of a thermal imaging system is seen inside a public hospital to measure temperature and identify people potentially infected with the coronavirus disease (COVID-19) in Valparaiso, Chile April 23, 2020. REUTERS/Rodrigo Garrido

A camera of a thermal imaging system is seen inside a public hospital to measure temperature and identify people potentially infected with the coronavirus disease (COVID-19) in Valparaiso, Chile April 23, 2020. REUTERS/Rodrigo Garrido

A screen shows a thermal imaging system taking the corporal temperature of health workers inside a public hospital to identify people potentially infected with the coronavirus disease (COVID-19) in Valparaiso, Chile April 23, 2020. REUTERS/Rodrigo Garrido

A screen shows a thermal imaging system taking the corporal temperature of health workers inside a public hospital to identify people potentially infected with the coronavirus disease (COVID-19) in Valparaiso, Chile April 23, 2020. REUTERS/Rodrigo Garrido

A camera of a thermal imaging system is seen inside a public hospital to measure temperature and identify people potentially infected with the coronavirus disease (COVID-19) in Valparaiso, Chile April 23, 2020. REUTERS/Rodrigo Garrido

Taiwan Foreign Minister Joseph Wu (C) attends a ceremony for the donation of thermal imaging cameras to Taiwan's Pacific allies, in Taipei, Taiwan April 15, 2020. REUTERS/Ben Blanchard

Turi Paz who is from Honduras, warms herself up with a thermal blanket as she waits with other asylum seekers to be transported to a holding facility for migrants, where they can then make an application to claim asylum, after they crossed the Rio Grande river into the United States from Mexico, in Penitas, Texas, U.S., April 1, 2019. Border patrol agents on the scene distributed the blankets as the weather became cold. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Turi Paz who is from Honduras, warms herself up with a thermal blanket as she waits with other asylum seekers to be transported to a holding facility for migrants, where they can then make an application to claim asylum, after they crossed the Rio Grande river into the United States from Mexico, in Penitas, Texas, U.S., April 1, 2019. Border patrol agents on the scene distributed the blankets as the weather became cold. REUTERS/Adrees Latif SEARCH "RIO GRANDE PATROL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Commuters wait for an U-Bahn underground train at Alexanderplatz station as Berlin authorities took new measures to cancel events with over 1,000 people because of the coronavirus disease (COVID-19) in Berlin, Germany, March 11, 2020. Picture taken with thermal imaging camera. REUTERS/Fabrizio Bensch

A combination picture taken with thermal imaging camera (top) and a DSLR camera shows people at Kurfuerstendamm boulevard as Berlin authorities took new measures to cancel events with over 1,000 people because of the coronavirus disease (COVID-19) in Berlin, Germany, March 11, 2020. REUTERS/Fabrizio Bensch

People are pictured at Kurfuerstendamm boulevard as Berlin authorities took new measures to cancel events with over 1,000 people because of the coronavirus disease (COVID-19) in Berlin, Germany, March 11, 2020. Picture taken with thermal imaging camera. REUTERS/Fabrizio Bensch

A combination picture taken with thermal imaging camera (top) and a DSLR camera shows people at a bus stop on Kurfuerstendamm boulevard while Berlin authorities took new measures to cancel events with over 1,000 people because of the coronavirus disease (COVID-19) in Berlin, Germany, March 11, 2020. REUTERS/Fabrizio Bensch

People stand at a bus stop on Kurfuerstendamm boulevard as Berlin authorities took new measures to cancel events with over 1,000 people because of the coronavirus disease (COVID-19) in Berlin, Germany, March 11, 2020. Picture taken with thermal imaging camera. REUTERS/Fabrizio Bensch

A combination picture taken with thermal imaging camera (top) and a DSLR camera shows commuters at main train station Hauptbahnhof as Berlin authorities took new measures to cancel events with over 1,000 people because of the coronavirus disease (COVID-19) in Berlin, Germany, March 11, 2020. REUTERS/Fabrizio Bensch

Commuters are pictured at main train station Hauptbahnhof as Berlin authorities took new measures to cancel events with over 1,000 people because of the coronavirus disease (COVID-19) in Berlin, Germany, March 11, 2020. Picture taken with thermal imaging camera. REUTERS/Fabrizio Bensch

A combination picture taken with thermal imaging camera (top) and a DSLR camera shows people in front of the Brandenburg Gate as Berlin authorities took new measures to cancel events with over 1,000 people because of the coronavirus disease (COVID-19) in Berlin, Germany, March 11, 2020. REUTERS/Fabrizio Bensch

People are pictured in front of the Brandenburg Gate as Berlin authorities took new measures to cancel events with over 1,000 people because of the coronavirus disease (COVID-19) in Berlin, Germany, March 11, 2020. Picture taken with thermal imaging camera. REUTERS/Fabrizio Bensch

A combination picture taken with thermal imaging camera (top) and a DSLR camera shows commuters waiting for an U-Bahn underground train at Alexanderplatz station while Berlin authorities took new measures to cancel events with over 1,000 people because of the coronavirus disease (COVID-19) in Berlin, Germany, March 11, 2020. REUTERS/Fabrizio Bensch

Commuters waiting for an U-Bahn underground train at Alexanderplatz station as Berlin authorities took new measures to cancel events with over 1,000 people because of the coronavirus disease (COVID-19) in Berlin, Germany, March 11, 2020. Picture taken with thermal imaging camera. REUTERS/Fabrizio Bensch

A helicopter from the Malaysian Police Air Wing Unit, equipped with a surveillance thermal imaging camera, participates in a search and rescue operation for 15-year-old Irish girl Nora Anne Quoirin who went missing from a resort in Seremban, Malaysia, August 8, 2019. Picture taken on August 8, 2019. REUTERS/Lim Huey Teng

Purple yams and a pot containing rice noodles placed by villagers are seen at a hot spring attraction in Rucheng county, Hunan province, China December 2, 2018. Picture taken December 2, 2018. To match Insight CHINA-ECONOMY/DEBT-RUCHENG. REUTERS/Shu Zhang

Coal is seen at a warehouse of the Trypillian thermal power plant in Kiev region, Ukraine November 23, 2017. REUTERS/Valentyn Ogirenko TPX IMAGES OF THE DAY

Power lines are seen near the Trypillian thermal power plant in Kiev region, Ukraine November 23, 2017. REUTERS/Valentyn Ogirenko

Coal is sorted into a pile at a warehouse of the Trypillian thermal power plant in Kiev region, Ukraine November 23, 2017. REUTERS/Valentyn Ogirenko

A power line is seen near the Trypillian thermal power plant in Kiev region, Ukraine November 23, 2017. REUTERS/Valentyn Ogirenko

A view shows a chimney of the Trypillian thermal power plant in Kiev region, Ukraine November 23, 2017. REUTERS/Valentyn Ogirenko

Coal is sorted into a pile at a warehouse of the Trypillian thermal power plant in Kiev region, Ukraine November 23, 2017. REUTERS/Valentyn Ogirenko

Power lines are seen near the Trypillian thermal power plant in Kiev region, Ukraine November 23, 2017. REUTERS/Valentyn Ogirenko

A pile of coal is seen at a warehouse of the Trypillian thermal power plant, owned by Ukrainian state-run energy company Centrenergo, in Kiev region, Ukraine November 23, 2017. Picture taken November 23, 2017. REUTERS/Valentyn Ogirenko

Steam rises from the chimneys of a thermal power plant behind the Ivan the Great Bell Tower in Moscow, Russia January 9, 2018. REUTERS/Maxim Shemetov TPX IMAGES OF THE DAY

Steam rises from the chimneys of a thermal power plant in Moscow, Russia January 9, 2018. REUTERS/Maxim Shemetov

Two women wrapped in thermal blankets stand near the Manchester Arena, where U.S. singer Ariana Grande had been performing, in Manchester, northern England, Britain, May 23, 2017. REUTERS/Andrew Yates TPX IMAGES OF THE DAY